Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aoba, Aramaki-aza, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
Waste Manag. 2021 Jan 1;119:152-161. doi: 10.1016/j.wasman.2020.09.050. Epub 2020 Oct 13.
Hydrothermally treated sewage sludge was pyrolyzed at temperatures of 300, 500, and 700 °C with antibiotic mycelial residue addition ratios of 0, 10, 25, and 50 wt%. The results showed that co-pyrolysis could obviously improve biochar properties. Specifically, adding antibiotic mycelial residue increased the aromaticity and raised the higher heating value of the biochar, which indicates its better potential as fuel. The enrichment in functional groups improved the surface properties of biochar, indicating its better applicability. Additionally, the heavy metal concentrations in biochar were diluted by adding antibiotic mycelial residue, which led to lower toxic inputs to the environment. Moreover, heavy metals were transformed to more stable fractions after co-pyrolysis. A higher pyrolysis temperature and greater antibiotic mycelial residue amounts led to better immobilization of heavy metals, thus preventing their leaching to the environment. This work proposes a promising technique for the synergetic treatment of sewage sludge and antibiotic mycelial residue for improved biochar formation.
经水热处理的污水污泥在 300、500 和 700°C 的温度下进行热解，并加入抗生素菌丝体残留物的比例为 0、10、25 和 50wt%。结果表明，共热解可以明显改善生物炭的性质。具体来说，添加抗生素菌丝体残留物增加了生物炭的芳香度，并提高了其高位热值，这表明其作为燃料的潜力更大。功能基团的富集改善了生物炭的表面性能，表明其具有更好的适用性。此外，通过添加抗生素菌丝体残留物，生物炭中的重金属浓度被稀释，从而降低了对环境的毒性输入。此外，重金属在共热解后转化为更稳定的组分。较高的热解温度和较大的抗生素菌丝体残留物量导致重金属更好地固定，从而防止其浸出到环境中。这项工作提出了一种有前途的协同处理污水污泥和抗生素菌丝体残留物以形成更好的生物炭的技术。
